./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label14.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ada1a27904128215b4edfdaf35827c452e538bc81c43cd0aac0f11f9e4d77236 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 12:46:08,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 12:46:08,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 12:46:08,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 12:46:08,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 12:46:08,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 12:46:08,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 12:46:08,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 12:46:08,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 12:46:08,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 12:46:08,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 12:46:08,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 12:46:08,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 12:46:08,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 12:46:08,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 12:46:08,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 12:46:08,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 12:46:08,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 12:46:08,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 12:46:08,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 12:46:08,577 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 12:46:08,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 12:46:08,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 12:46:08,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 12:46:08,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 12:46:08,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 12:46:08,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 12:46:08,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 12:46:08,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 12:46:08,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 12:46:08,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 12:46:08,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 12:46:08,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 12:46:08,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 12:46:08,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 12:46:08,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 12:46:08,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 12:46:08,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 12:46:08,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 12:46:08,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 12:46:08,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 12:46:08,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 12:46:08,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 12:46:08,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 12:46:08,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 12:46:08,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 12:46:08,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 12:46:08,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 12:46:08,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 12:46:08,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 12:46:08,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 12:46:08,617 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 12:46:08,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 12:46:08,617 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 12:46:08,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 12:46:08,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 12:46:08,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 12:46:08,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 12:46:08,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 12:46:08,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 12:46:08,619 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 12:46:08,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 12:46:08,620 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 12:46:08,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 12:46:08,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 12:46:08,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 12:46:08,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 12:46:08,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:46:08,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 12:46:08,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 12:46:08,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 12:46:08,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 12:46:08,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 12:46:08,622 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 12:46:08,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 12:46:08,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 12:46:08,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ada1a27904128215b4edfdaf35827c452e538bc81c43cd0aac0f11f9e4d77236 [2022-07-13 12:46:08,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 12:46:08,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 12:46:08,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 12:46:08,805 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 12:46:08,806 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 12:46:08,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label14.c [2022-07-13 12:46:08,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ae7b9d1/24b5e850c317465e837a142474d98bcb/FLAGe2f5d95b6 [2022-07-13 12:46:09,390 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 12:46:09,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label14.c [2022-07-13 12:46:09,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ae7b9d1/24b5e850c317465e837a142474d98bcb/FLAGe2f5d95b6 [2022-07-13 12:46:09,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ae7b9d1/24b5e850c317465e837a142474d98bcb [2022-07-13 12:46:09,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 12:46:09,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 12:46:09,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 12:46:09,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 12:46:09,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 12:46:09,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:46:09" (1/1) ... [2022-07-13 12:46:09,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52f98c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:09, skipping insertion in model container [2022-07-13 12:46:09,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:46:09" (1/1) ... [2022-07-13 12:46:09,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 12:46:09,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 12:46:09,890 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label14.c[6042,6055] [2022-07-13 12:46:10,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:46:10,414 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 12:46:10,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label14.c[6042,6055] [2022-07-13 12:46:10,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:46:10,744 INFO L208 MainTranslator]: Completed translation [2022-07-13 12:46:10,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10 WrapperNode [2022-07-13 12:46:10,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 12:46:10,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 12:46:10,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 12:46:10,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 12:46:10,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:10,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:11,069 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-13 12:46:11,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 12:46:11,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 12:46:11,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 12:46:11,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 12:46:11,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:11,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:11,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:11,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:11,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:11,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:11,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:11,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 12:46:11,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 12:46:11,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 12:46:11,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 12:46:11,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (1/1) ... [2022-07-13 12:46:11,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:46:11,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:46:11,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 12:46:11,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 12:46:11,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 12:46:11,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 12:46:11,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 12:46:11,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 12:46:11,565 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 12:46:11,566 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 12:46:14,094 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 12:46:14,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 12:46:14,104 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 12:46:14,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:46:14 BoogieIcfgContainer [2022-07-13 12:46:14,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 12:46:14,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 12:46:14,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 12:46:14,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 12:46:14,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 12:46:09" (1/3) ... [2022-07-13 12:46:14,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39820bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:46:14, skipping insertion in model container [2022-07-13 12:46:14,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:46:10" (2/3) ... [2022-07-13 12:46:14,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39820bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:46:14, skipping insertion in model container [2022-07-13 12:46:14,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:46:14" (3/3) ... [2022-07-13 12:46:14,112 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label14.c [2022-07-13 12:46:14,121 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 12:46:14,121 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 12:46:14,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 12:46:14,164 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a57b0d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7822aabb [2022-07-13 12:46:14,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 12:46:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 12:46:14,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:14,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:14,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:14,179 INFO L85 PathProgramCache]: Analyzing trace with hash 563919826, now seen corresponding path program 1 times [2022-07-13 12:46:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:14,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775220515] [2022-07-13 12:46:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:14,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:46:14,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:14,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775220515] [2022-07-13 12:46:14,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775220515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:14,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:14,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:14,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181766177] [2022-07-13 12:46:14,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:14,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:46:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:46:14,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:46:14,451 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:19,710 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2022-07-13 12:46:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:46:19,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-13 12:46:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:19,733 INFO L225 Difference]: With dead ends: 3142 [2022-07-13 12:46:19,733 INFO L226 Difference]: Without dead ends: 2257 [2022-07-13 12:46:19,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:46:19,740 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 2213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5678 mSolverCounterSat, 1220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2213 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 6898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1220 IncrementalHoareTripleChecker+Valid, 5678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:19,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2213 Valid, 783 Invalid, 6898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1220 Valid, 5678 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-13 12:46:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2022-07-13 12:46:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2022-07-13 12:46:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5802304964539007) internal successors, (3565), 2256 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3565 transitions. [2022-07-13 12:46:19,829 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3565 transitions. Word has length 48 [2022-07-13 12:46:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:19,830 INFO L495 AbstractCegarLoop]: Abstraction has 2257 states and 3565 transitions. [2022-07-13 12:46:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3565 transitions. [2022-07-13 12:46:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 12:46:19,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:19,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:19,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 12:46:19,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:19,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:19,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1162572255, now seen corresponding path program 1 times [2022-07-13 12:46:19,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:19,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331939349] [2022-07-13 12:46:19,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:19,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:46:19,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:19,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331939349] [2022-07-13 12:46:19,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331939349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:19,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:19,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:19,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749402216] [2022-07-13 12:46:19,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:19,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:46:19,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:46:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:46:19,957 INFO L87 Difference]: Start difference. First operand 2257 states and 3565 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:23,028 INFO L93 Difference]: Finished difference Result 5300 states and 9213 transitions. [2022-07-13 12:46:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:46:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-13 12:46:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:23,040 INFO L225 Difference]: With dead ends: 5300 [2022-07-13 12:46:23,040 INFO L226 Difference]: Without dead ends: 3759 [2022-07-13 12:46:23,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:46:23,045 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:23,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-13 12:46:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2022-07-13 12:46:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2022-07-13 12:46:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3685470995210218) internal successors, (5143), 3758 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5143 transitions. [2022-07-13 12:46:23,089 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5143 transitions. Word has length 119 [2022-07-13 12:46:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:23,091 INFO L495 AbstractCegarLoop]: Abstraction has 3759 states and 5143 transitions. [2022-07-13 12:46:23,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5143 transitions. [2022-07-13 12:46:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-13 12:46:23,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:23,104 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:23,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 12:46:23,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash 560363496, now seen corresponding path program 1 times [2022-07-13 12:46:23,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:23,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670381195] [2022-07-13 12:46:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:23,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 12:46:23,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:23,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670381195] [2022-07-13 12:46:23,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670381195] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:46:23,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210923586] [2022-07-13 12:46:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:23,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:46:23,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:46:23,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 12:46:23,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 12:46:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:23,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 12:46:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:46:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 12:46:23,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:46:23,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210923586] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:23,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:46:23,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-13 12:46:23,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658826444] [2022-07-13 12:46:23,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:23,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:46:23,603 INFO L87 Difference]: Start difference. First operand 3759 states and 5143 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:25,916 INFO L93 Difference]: Finished difference Result 9769 states and 13912 transitions. [2022-07-13 12:46:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2022-07-13 12:46:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:25,934 INFO L225 Difference]: With dead ends: 9769 [2022-07-13 12:46:25,934 INFO L226 Difference]: Without dead ends: 6763 [2022-07-13 12:46:25,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:46:25,943 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 669 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:25,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 402 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:46:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-07-13 12:46:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-07-13 12:46:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.287341023365868) internal successors, (8705), 6762 states have internal predecessors, (8705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 8705 transitions. [2022-07-13 12:46:26,028 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 8705 transitions. Word has length 193 [2022-07-13 12:46:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:26,029 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 8705 transitions. [2022-07-13 12:46:26,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 8705 transitions. [2022-07-13 12:46:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-13 12:46:26,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:26,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:26,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 12:46:26,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:46:26,249 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1542875905, now seen corresponding path program 1 times [2022-07-13 12:46:26,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:26,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6469546] [2022-07-13 12:46:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 12:46:26,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6469546] [2022-07-13 12:46:26,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6469546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:26,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:26,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364009405] [2022-07-13 12:46:26,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:26,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:46:26,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:46:26,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:46:26,365 INFO L87 Difference]: Start difference. First operand 6763 states and 8705 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:29,314 INFO L93 Difference]: Finished difference Result 15816 states and 21393 transitions. [2022-07-13 12:46:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:46:29,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2022-07-13 12:46:29,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:29,346 INFO L225 Difference]: With dead ends: 15816 [2022-07-13 12:46:29,346 INFO L226 Difference]: Without dead ends: 9769 [2022-07-13 12:46:29,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:46:29,359 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 776 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 4451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:29,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 492 Invalid, 4451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-13 12:46:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2022-07-13 12:46:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 9767. [2022-07-13 12:46:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.272987917263977) internal successors, (12432), 9766 states have internal predecessors, (12432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12432 transitions. [2022-07-13 12:46:29,470 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12432 transitions. Word has length 260 [2022-07-13 12:46:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:29,470 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 12432 transitions. [2022-07-13 12:46:29,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12432 transitions. [2022-07-13 12:46:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-07-13 12:46:29,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:29,473 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:29,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 12:46:29,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:29,474 INFO L85 PathProgramCache]: Analyzing trace with hash 542708520, now seen corresponding path program 1 times [2022-07-13 12:46:29,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:29,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965097320] [2022-07-13 12:46:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:29,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 12:46:29,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:29,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965097320] [2022-07-13 12:46:29,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965097320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:29,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:29,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:29,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14997964] [2022-07-13 12:46:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:29,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:29,601 INFO L87 Difference]: Start difference. First operand 9767 states and 12432 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:31,952 INFO L93 Difference]: Finished difference Result 23287 states and 30484 transitions. [2022-07-13 12:46:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:31,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2022-07-13 12:46:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:31,985 INFO L225 Difference]: With dead ends: 23287 [2022-07-13 12:46:31,989 INFO L226 Difference]: Without dead ends: 14273 [2022-07-13 12:46:31,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:31,997 INFO L413 NwaCegarLoop]: 1386 mSDtfsCounter, 709 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:31,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 1394 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 2196 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 12:46:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14273 states. [2022-07-13 12:46:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273. [2022-07-13 12:46:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 1.234515134529148) internal successors, (17619), 14272 states have internal predecessors, (17619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 17619 transitions. [2022-07-13 12:46:32,154 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 17619 transitions. Word has length 278 [2022-07-13 12:46:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:32,154 INFO L495 AbstractCegarLoop]: Abstraction has 14273 states and 17619 transitions. [2022-07-13 12:46:32,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 17619 transitions. [2022-07-13 12:46:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-07-13 12:46:32,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:32,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 12:46:32,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash 280868765, now seen corresponding path program 1 times [2022-07-13 12:46:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:32,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192595211] [2022-07-13 12:46:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-13 12:46:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192595211] [2022-07-13 12:46:32,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192595211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:32,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:32,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:46:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985958653] [2022-07-13 12:46:32,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:32,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:32,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:32,270 INFO L87 Difference]: Start difference. First operand 14273 states and 17619 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:34,612 INFO L93 Difference]: Finished difference Result 39058 states and 48927 transitions. [2022-07-13 12:46:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:34,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-07-13 12:46:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:34,648 INFO L225 Difference]: With dead ends: 39058 [2022-07-13 12:46:34,648 INFO L226 Difference]: Without dead ends: 25538 [2022-07-13 12:46:34,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:34,659 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 620 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:34,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 597 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:46:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25538 states. [2022-07-13 12:46:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25538 to 23285. [2022-07-13 12:46:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.1806820133997595) internal successors, (27491), 23284 states have internal predecessors, (27491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 27491 transitions. [2022-07-13 12:46:34,871 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 27491 transitions. Word has length 311 [2022-07-13 12:46:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:34,872 INFO L495 AbstractCegarLoop]: Abstraction has 23285 states and 27491 transitions. [2022-07-13 12:46:34,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 27491 transitions. [2022-07-13 12:46:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-07-13 12:46:34,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:34,877 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:34,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 12:46:34,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:34,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1741842904, now seen corresponding path program 1 times [2022-07-13 12:46:34,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:34,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781742628] [2022-07-13 12:46:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:34,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 12:46:35,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781742628] [2022-07-13 12:46:35,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781742628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:35,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:35,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:35,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788335158] [2022-07-13 12:46:35,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:35,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:35,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:35,018 INFO L87 Difference]: Start difference. First operand 23285 states and 27491 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:37,570 INFO L93 Difference]: Finished difference Result 57082 states and 68684 transitions. [2022-07-13 12:46:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2022-07-13 12:46:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:37,620 INFO L225 Difference]: With dead ends: 57082 [2022-07-13 12:46:37,621 INFO L226 Difference]: Without dead ends: 34550 [2022-07-13 12:46:37,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:37,641 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 773 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 1074 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1074 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:37,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 139 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1074 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 12:46:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2022-07-13 12:46:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32297. [2022-07-13 12:46:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32297 states, 32296 states have (on average 1.2027495665097845) internal successors, (38844), 32296 states have internal predecessors, (38844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32297 states to 32297 states and 38844 transitions. [2022-07-13 12:46:37,952 INFO L78 Accepts]: Start accepts. Automaton has 32297 states and 38844 transitions. Word has length 390 [2022-07-13 12:46:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:37,953 INFO L495 AbstractCegarLoop]: Abstraction has 32297 states and 38844 transitions. [2022-07-13 12:46:37,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 32297 states and 38844 transitions. [2022-07-13 12:46:37,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-07-13 12:46:37,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:37,964 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:37,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 12:46:37,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash 98614002, now seen corresponding path program 1 times [2022-07-13 12:46:37,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:37,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002278398] [2022-07-13 12:46:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:37,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 478 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-13 12:46:38,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:38,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002278398] [2022-07-13 12:46:38,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002278398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:38,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:38,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:38,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124180230] [2022-07-13 12:46:38,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:38,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:38,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:38,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:38,079 INFO L87 Difference]: Start difference. First operand 32297 states and 38844 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:40,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:40,501 INFO L93 Difference]: Finished difference Result 79612 states and 95769 transitions. [2022-07-13 12:46:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:40,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2022-07-13 12:46:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:40,556 INFO L225 Difference]: With dead ends: 79612 [2022-07-13 12:46:40,556 INFO L226 Difference]: Without dead ends: 48068 [2022-07-13 12:46:40,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:40,579 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 734 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 3026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:40,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 173 Invalid, 3026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:46:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2022-07-13 12:46:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 45064. [2022-07-13 12:46:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45064 states, 45063 states have (on average 1.1978119521558708) internal successors, (53977), 45063 states have internal predecessors, (53977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45064 states to 45064 states and 53977 transitions. [2022-07-13 12:46:40,989 INFO L78 Accepts]: Start accepts. Automaton has 45064 states and 53977 transitions. Word has length 407 [2022-07-13 12:46:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:40,990 INFO L495 AbstractCegarLoop]: Abstraction has 45064 states and 53977 transitions. [2022-07-13 12:46:40,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 45064 states and 53977 transitions. [2022-07-13 12:46:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-07-13 12:46:40,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:40,998 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:40,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 12:46:40,998 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1099135644, now seen corresponding path program 1 times [2022-07-13 12:46:40,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:40,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434379911] [2022-07-13 12:46:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:40,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 478 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-13 12:46:41,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:41,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434379911] [2022-07-13 12:46:41,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434379911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:41,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:41,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:41,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296709312] [2022-07-13 12:46:41,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:41,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:41,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:41,168 INFO L87 Difference]: Start difference. First operand 45064 states and 53977 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:43,284 INFO L93 Difference]: Finished difference Result 90877 states and 108730 transitions. [2022-07-13 12:46:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:43,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 427 [2022-07-13 12:46:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:43,335 INFO L225 Difference]: With dead ends: 90877 [2022-07-13 12:46:43,335 INFO L226 Difference]: Without dead ends: 46566 [2022-07-13 12:46:43,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:43,368 INFO L413 NwaCegarLoop]: 998 mSDtfsCounter, 829 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 2621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:43,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 1005 Invalid, 2621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 12:46:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46566 states. [2022-07-13 12:46:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46566 to 44313. [2022-07-13 12:46:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44313 states, 44312 states have (on average 1.158015887344286) internal successors, (51314), 44312 states have internal predecessors, (51314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44313 states to 44313 states and 51314 transitions. [2022-07-13 12:46:43,881 INFO L78 Accepts]: Start accepts. Automaton has 44313 states and 51314 transitions. Word has length 427 [2022-07-13 12:46:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:43,882 INFO L495 AbstractCegarLoop]: Abstraction has 44313 states and 51314 transitions. [2022-07-13 12:46:43,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 44313 states and 51314 transitions. [2022-07-13 12:46:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-07-13 12:46:43,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:43,888 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:43,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 12:46:43,889 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:43,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:43,889 INFO L85 PathProgramCache]: Analyzing trace with hash -238853480, now seen corresponding path program 1 times [2022-07-13 12:46:43,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:43,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955966121] [2022-07-13 12:46:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:43,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-13 12:46:43,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:43,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955966121] [2022-07-13 12:46:43,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955966121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:43,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:43,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:43,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426883929] [2022-07-13 12:46:43,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:43,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:43,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:43,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:43,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:43,988 INFO L87 Difference]: Start difference. First operand 44313 states and 51314 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:46,603 INFO L93 Difference]: Finished difference Result 91628 states and 105846 transitions. [2022-07-13 12:46:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:46,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 440 [2022-07-13 12:46:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:46,649 INFO L225 Difference]: With dead ends: 91628 [2022-07-13 12:46:46,650 INFO L226 Difference]: Without dead ends: 48068 [2022-07-13 12:46:46,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:46,667 INFO L413 NwaCegarLoop]: 1257 mSDtfsCounter, 649 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:46,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1265 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 12:46:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2022-07-13 12:46:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 46566. [2022-07-13 12:46:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46566 states, 46565 states have (on average 1.1437130892301084) internal successors, (53257), 46565 states have internal predecessors, (53257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46566 states to 46566 states and 53257 transitions. [2022-07-13 12:46:47,143 INFO L78 Accepts]: Start accepts. Automaton has 46566 states and 53257 transitions. Word has length 440 [2022-07-13 12:46:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:47,144 INFO L495 AbstractCegarLoop]: Abstraction has 46566 states and 53257 transitions. [2022-07-13 12:46:47,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 46566 states and 53257 transitions. [2022-07-13 12:46:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-07-13 12:46:47,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:47,150 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:47,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 12:46:47,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1074035742, now seen corresponding path program 1 times [2022-07-13 12:46:47,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:47,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644457914] [2022-07-13 12:46:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:47,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-13 12:46:47,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644457914] [2022-07-13 12:46:47,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644457914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:47,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:47,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:47,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51359450] [2022-07-13 12:46:47,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:47,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:47,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:47,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:47,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:47,268 INFO L87 Difference]: Start difference. First operand 46566 states and 53257 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:49,609 INFO L93 Difference]: Finished difference Result 102893 states and 117134 transitions. [2022-07-13 12:46:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:49,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2022-07-13 12:46:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:49,670 INFO L225 Difference]: With dead ends: 102893 [2022-07-13 12:46:49,670 INFO L226 Difference]: Without dead ends: 57080 [2022-07-13 12:46:49,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:49,695 INFO L413 NwaCegarLoop]: 891 mSDtfsCounter, 803 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:49,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 898 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 12:46:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57080 states. [2022-07-13 12:46:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57080 to 51823. [2022-07-13 12:46:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51823 states, 51822 states have (on average 1.118405310485894) internal successors, (57958), 51822 states have internal predecessors, (57958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51823 states to 51823 states and 57958 transitions. [2022-07-13 12:46:50,235 INFO L78 Accepts]: Start accepts. Automaton has 51823 states and 57958 transitions. Word has length 444 [2022-07-13 12:46:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:50,236 INFO L495 AbstractCegarLoop]: Abstraction has 51823 states and 57958 transitions. [2022-07-13 12:46:50,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 51823 states and 57958 transitions. [2022-07-13 12:46:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-07-13 12:46:50,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:50,243 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:50,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 12:46:50,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1553708824, now seen corresponding path program 1 times [2022-07-13 12:46:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420549772] [2022-07-13 12:46:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 463 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-13 12:46:50,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:50,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420549772] [2022-07-13 12:46:50,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420549772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:50,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:50,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:50,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149698441] [2022-07-13 12:46:50,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:50,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:50,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:50,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:50,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:50,361 INFO L87 Difference]: Start difference. First operand 51823 states and 57958 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:53,211 INFO L93 Difference]: Finished difference Result 137439 states and 154208 transitions. [2022-07-13 12:46:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:53,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 447 [2022-07-13 12:46:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:53,305 INFO L225 Difference]: With dead ends: 137439 [2022-07-13 12:46:53,306 INFO L226 Difference]: Without dead ends: 86369 [2022-07-13 12:46:53,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:53,342 INFO L413 NwaCegarLoop]: 1306 mSDtfsCounter, 684 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:53,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 1314 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 12:46:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86369 states. [2022-07-13 12:46:54,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86369 to 75855. [2022-07-13 12:46:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75855 states, 75854 states have (on average 1.1025654546892716) internal successors, (83634), 75854 states have internal predecessors, (83634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75855 states to 75855 states and 83634 transitions. [2022-07-13 12:46:54,184 INFO L78 Accepts]: Start accepts. Automaton has 75855 states and 83634 transitions. Word has length 447 [2022-07-13 12:46:54,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:54,184 INFO L495 AbstractCegarLoop]: Abstraction has 75855 states and 83634 transitions. [2022-07-13 12:46:54,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 75855 states and 83634 transitions. [2022-07-13 12:46:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2022-07-13 12:46:54,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:54,192 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:54,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 12:46:54,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:54,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1142276099, now seen corresponding path program 1 times [2022-07-13 12:46:54,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:54,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982106440] [2022-07-13 12:46:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:54,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-13 12:46:54,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:54,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982106440] [2022-07-13 12:46:54,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982106440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:54,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:54,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:54,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026139211] [2022-07-13 12:46:54,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:54,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:54,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:54,333 INFO L87 Difference]: Start difference. First operand 75855 states and 83634 transitions. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:46:56,871 INFO L93 Difference]: Finished difference Result 153210 states and 168772 transitions. [2022-07-13 12:46:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:46:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 488 [2022-07-13 12:46:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:46:56,955 INFO L225 Difference]: With dead ends: 153210 [2022-07-13 12:46:56,956 INFO L226 Difference]: Without dead ends: 78108 [2022-07-13 12:46:56,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:56,983 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 681 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 12:46:56,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 214 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 12:46:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78108 states. [2022-07-13 12:46:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78108 to 72851. [2022-07-13 12:46:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72851 states, 72850 states have (on average 1.0855456417295812) internal successors, (79082), 72850 states have internal predecessors, (79082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72851 states to 72851 states and 79082 transitions. [2022-07-13 12:46:57,657 INFO L78 Accepts]: Start accepts. Automaton has 72851 states and 79082 transitions. Word has length 488 [2022-07-13 12:46:57,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:46:57,657 INFO L495 AbstractCegarLoop]: Abstraction has 72851 states and 79082 transitions. [2022-07-13 12:46:57,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:46:57,657 INFO L276 IsEmpty]: Start isEmpty. Operand 72851 states and 79082 transitions. [2022-07-13 12:46:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-07-13 12:46:57,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:46:57,664 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:46:57,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 12:46:57,664 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:46:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:46:57,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1238147040, now seen corresponding path program 1 times [2022-07-13 12:46:57,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:46:57,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695585381] [2022-07-13 12:46:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:46:57,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:46:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:46:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 398 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-13 12:46:57,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:46:57,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695585381] [2022-07-13 12:46:57,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695585381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:46:57,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:46:57,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:46:57,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527734053] [2022-07-13 12:46:57,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:46:57,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:46:57,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:46:57,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:46:57,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:46:57,943 INFO L87 Difference]: Start difference. First operand 72851 states and 79082 transitions. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:47:00,476 INFO L93 Difference]: Finished difference Result 144949 states and 157406 transitions. [2022-07-13 12:47:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:47:00,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 510 [2022-07-13 12:47:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:47:00,546 INFO L225 Difference]: With dead ends: 144949 [2022-07-13 12:47:00,547 INFO L226 Difference]: Without dead ends: 72851 [2022-07-13 12:47:00,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:00,571 INFO L413 NwaCegarLoop]: 1268 mSDtfsCounter, 567 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 12:47:00,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 1276 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 12:47:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72851 states. [2022-07-13 12:47:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72851 to 69096. [2022-07-13 12:47:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69096 states, 69095 states have (on average 1.0611911136840582) internal successors, (73323), 69095 states have internal predecessors, (73323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69096 states to 69096 states and 73323 transitions. [2022-07-13 12:47:01,208 INFO L78 Accepts]: Start accepts. Automaton has 69096 states and 73323 transitions. Word has length 510 [2022-07-13 12:47:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:47:01,208 INFO L495 AbstractCegarLoop]: Abstraction has 69096 states and 73323 transitions. [2022-07-13 12:47:01,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 69096 states and 73323 transitions. [2022-07-13 12:47:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-07-13 12:47:01,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:47:01,215 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:47:01,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 12:47:01,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:47:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:47:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -365935070, now seen corresponding path program 1 times [2022-07-13 12:47:01,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:47:01,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164129336] [2022-07-13 12:47:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:47:01,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:47:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:47:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 413 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 12:47:01,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:47:01,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164129336] [2022-07-13 12:47:01,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164129336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:47:01,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:47:01,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:47:01,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895952717] [2022-07-13 12:47:01,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:47:01,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:47:01,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:47:01,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:47:01,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:01,349 INFO L87 Difference]: Start difference. First operand 69096 states and 73323 transitions. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:47:03,885 INFO L93 Difference]: Finished difference Result 160720 states and 171238 transitions. [2022-07-13 12:47:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:47:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 525 [2022-07-13 12:47:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:47:04,134 INFO L225 Difference]: With dead ends: 160720 [2022-07-13 12:47:04,135 INFO L226 Difference]: Without dead ends: 92377 [2022-07-13 12:47:04,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:04,169 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 673 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 12:47:04,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 109 Invalid, 2857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 12:47:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92377 states. [2022-07-13 12:47:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92377 to 91626. [2022-07-13 12:47:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91626 states, 91625 states have (on average 1.0609768076398363) internal successors, (97212), 91625 states have internal predecessors, (97212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91626 states to 91626 states and 97212 transitions. [2022-07-13 12:47:05,035 INFO L78 Accepts]: Start accepts. Automaton has 91626 states and 97212 transitions. Word has length 525 [2022-07-13 12:47:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:47:05,036 INFO L495 AbstractCegarLoop]: Abstraction has 91626 states and 97212 transitions. [2022-07-13 12:47:05,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 91626 states and 97212 transitions. [2022-07-13 12:47:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-07-13 12:47:05,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:47:05,043 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:47:05,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 12:47:05,043 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:47:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:47:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash -931907824, now seen corresponding path program 1 times [2022-07-13 12:47:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:47:05,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437089872] [2022-07-13 12:47:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:47:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:47:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:47:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-07-13 12:47:05,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:47:05,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437089872] [2022-07-13 12:47:05,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437089872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:47:05,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:47:05,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:47:05,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063352453] [2022-07-13 12:47:05,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:47:05,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:47:05,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:47:05,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:47:05,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:05,336 INFO L87 Difference]: Start difference. First operand 91626 states and 97212 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:47:07,905 INFO L93 Difference]: Finished difference Result 199021 states and 211666 transitions. [2022-07-13 12:47:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:47:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 528 [2022-07-13 12:47:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:47:08,035 INFO L225 Difference]: With dead ends: 199021 [2022-07-13 12:47:08,035 INFO L226 Difference]: Without dead ends: 108148 [2022-07-13 12:47:08,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:08,065 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 826 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 12:47:08,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1117 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 12:47:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108148 states. [2022-07-13 12:47:09,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108148 to 105895. [2022-07-13 12:47:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105895 states, 105894 states have (on average 1.0585680019642283) internal successors, (112096), 105894 states have internal predecessors, (112096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105895 states to 105895 states and 112096 transitions. [2022-07-13 12:47:09,426 INFO L78 Accepts]: Start accepts. Automaton has 105895 states and 112096 transitions. Word has length 528 [2022-07-13 12:47:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:47:09,426 INFO L495 AbstractCegarLoop]: Abstraction has 105895 states and 112096 transitions. [2022-07-13 12:47:09,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 105895 states and 112096 transitions. [2022-07-13 12:47:09,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-07-13 12:47:09,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:47:09,436 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:47:09,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 12:47:09,437 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:47:09,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:47:09,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1809927383, now seen corresponding path program 1 times [2022-07-13 12:47:09,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:47:09,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520280000] [2022-07-13 12:47:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:47:09,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:47:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:47:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 765 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-13 12:47:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:47:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520280000] [2022-07-13 12:47:09,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520280000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:47:09,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:47:09,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:47:09,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498356999] [2022-07-13 12:47:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:47:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:47:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:47:09,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:47:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:09,575 INFO L87 Difference]: Start difference. First operand 105895 states and 112096 transitions. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:47:12,140 INFO L93 Difference]: Finished difference Result 219298 states and 231962 transitions. [2022-07-13 12:47:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:47:12,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 601 [2022-07-13 12:47:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:47:12,260 INFO L225 Difference]: With dead ends: 219298 [2022-07-13 12:47:12,261 INFO L226 Difference]: Without dead ends: 114156 [2022-07-13 12:47:12,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:12,315 INFO L413 NwaCegarLoop]: 1247 mSDtfsCounter, 591 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 12:47:12,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1255 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2424 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 12:47:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114156 states. [2022-07-13 12:47:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114156 to 111903. [2022-07-13 12:47:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111903 states, 111902 states have (on average 1.0565941627495488) internal successors, (118235), 111902 states have internal predecessors, (118235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111903 states to 111903 states and 118235 transitions. [2022-07-13 12:47:13,713 INFO L78 Accepts]: Start accepts. Automaton has 111903 states and 118235 transitions. Word has length 601 [2022-07-13 12:47:13,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:47:13,714 INFO L495 AbstractCegarLoop]: Abstraction has 111903 states and 118235 transitions. [2022-07-13 12:47:13,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 111903 states and 118235 transitions. [2022-07-13 12:47:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2022-07-13 12:47:13,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:47:13,729 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:47:13,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 12:47:13,730 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:47:13,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:47:13,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2091392152, now seen corresponding path program 1 times [2022-07-13 12:47:13,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:47:13,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191473390] [2022-07-13 12:47:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:47:13,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:47:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:47:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 839 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-07-13 12:47:14,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:47:14,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191473390] [2022-07-13 12:47:14,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191473390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:47:14,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:47:14,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:47:14,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444950003] [2022-07-13 12:47:14,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:47:14,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:47:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:47:14,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:47:14,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:14,191 INFO L87 Difference]: Start difference. First operand 111903 states and 118235 transitions. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:47:16,763 INFO L93 Difference]: Finished difference Result 226808 states and 239545 transitions. [2022-07-13 12:47:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:47:16,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 638 [2022-07-13 12:47:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:47:16,885 INFO L225 Difference]: With dead ends: 226808 [2022-07-13 12:47:16,885 INFO L226 Difference]: Without dead ends: 115658 [2022-07-13 12:47:16,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:16,919 INFO L413 NwaCegarLoop]: 1275 mSDtfsCounter, 603 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:47:16,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1283 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 12:47:16,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115658 states. [2022-07-13 12:47:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115658 to 111903. [2022-07-13 12:47:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111903 states, 111902 states have (on average 1.0557094600632697) internal successors, (118136), 111902 states have internal predecessors, (118136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111903 states to 111903 states and 118136 transitions. [2022-07-13 12:47:18,199 INFO L78 Accepts]: Start accepts. Automaton has 111903 states and 118136 transitions. Word has length 638 [2022-07-13 12:47:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:47:18,199 INFO L495 AbstractCegarLoop]: Abstraction has 111903 states and 118136 transitions. [2022-07-13 12:47:18,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 111903 states and 118136 transitions. [2022-07-13 12:47:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2022-07-13 12:47:18,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:47:18,212 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:47:18,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 12:47:18,212 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:47:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:47:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1905814311, now seen corresponding path program 1 times [2022-07-13 12:47:18,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:47:18,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057320643] [2022-07-13 12:47:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:47:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:47:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:47:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 1101 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-07-13 12:47:18,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:47:18,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057320643] [2022-07-13 12:47:18,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057320643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:47:18,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:47:18,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 12:47:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113036023] [2022-07-13 12:47:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:47:18,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:47:18,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:47:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:47:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:47:18,379 INFO L87 Difference]: Start difference. First operand 111903 states and 118136 transitions. Second operand has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:47:22,363 INFO L93 Difference]: Finished difference Result 234318 states and 247221 transitions. [2022-07-13 12:47:22,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:47:22,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 657 [2022-07-13 12:47:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:47:22,508 INFO L225 Difference]: With dead ends: 234318 [2022-07-13 12:47:22,508 INFO L226 Difference]: Without dead ends: 122417 [2022-07-13 12:47:22,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:47:22,572 INFO L413 NwaCegarLoop]: 1344 mSDtfsCounter, 1307 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5433 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 5626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 5433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:47:22,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1307 Valid, 1366 Invalid, 5626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 5433 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-13 12:47:22,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122417 states. [2022-07-13 12:47:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122417 to 122417. [2022-07-13 12:47:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122417 states, 122416 states have (on average 1.0509655600575087) internal successors, (128655), 122416 states have internal predecessors, (128655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122417 states to 122417 states and 128655 transitions. [2022-07-13 12:47:23,957 INFO L78 Accepts]: Start accepts. Automaton has 122417 states and 128655 transitions. Word has length 657 [2022-07-13 12:47:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:47:23,957 INFO L495 AbstractCegarLoop]: Abstraction has 122417 states and 128655 transitions. [2022-07-13 12:47:23,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 122417 states and 128655 transitions. [2022-07-13 12:47:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2022-07-13 12:47:23,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:47:23,972 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:47:23,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 12:47:23,972 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:47:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:47:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash -233960246, now seen corresponding path program 1 times [2022-07-13 12:47:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:47:23,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332893990] [2022-07-13 12:47:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:47:23,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:47:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:47:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 596 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-07-13 12:47:24,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:47:24,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332893990] [2022-07-13 12:47:24,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332893990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:47:24,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:47:24,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:47:24,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368270406] [2022-07-13 12:47:24,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:47:24,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:47:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:47:24,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:47:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:24,131 INFO L87 Difference]: Start difference. First operand 122417 states and 128655 transitions. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:47:27,664 INFO L93 Difference]: Finished difference Result 295900 states and 312049 transitions. [2022-07-13 12:47:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:47:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 706 [2022-07-13 12:47:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:47:27,855 INFO L225 Difference]: With dead ends: 295900 [2022-07-13 12:47:27,855 INFO L226 Difference]: Without dead ends: 174236 [2022-07-13 12:47:27,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:27,887 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 604 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-13 12:47:27,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 438 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-13 12:47:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174236 states. [2022-07-13 12:47:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174236 to 169730. [2022-07-13 12:47:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169730 states, 169729 states have (on average 1.049496550383258) internal successors, (178130), 169729 states have internal predecessors, (178130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169730 states to 169730 states and 178130 transitions. [2022-07-13 12:47:29,747 INFO L78 Accepts]: Start accepts. Automaton has 169730 states and 178130 transitions. Word has length 706 [2022-07-13 12:47:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:47:29,748 INFO L495 AbstractCegarLoop]: Abstraction has 169730 states and 178130 transitions. [2022-07-13 12:47:29,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 169730 states and 178130 transitions. [2022-07-13 12:47:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 747 [2022-07-13 12:47:29,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:47:29,764 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:47:29,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 12:47:29,765 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:47:29,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:47:29,766 INFO L85 PathProgramCache]: Analyzing trace with hash -895048154, now seen corresponding path program 1 times [2022-07-13 12:47:29,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:47:29,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971353754] [2022-07-13 12:47:29,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:47:29,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:47:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:47:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2022-07-13 12:47:29,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:47:29,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971353754] [2022-07-13 12:47:29,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971353754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:47:29,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:47:29,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:47:29,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502975043] [2022-07-13 12:47:29,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:47:29,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:47:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:47:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:47:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:29,951 INFO L87 Difference]: Start difference. First operand 169730 states and 178130 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:47:33,123 INFO L93 Difference]: Finished difference Result 341711 states and 358519 transitions. [2022-07-13 12:47:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:47:33,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 746 [2022-07-13 12:47:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:47:33,319 INFO L225 Difference]: With dead ends: 341711 [2022-07-13 12:47:33,319 INFO L226 Difference]: Without dead ends: 172734 [2022-07-13 12:47:33,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:47:33,390 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 821 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 12:47:33,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 106 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 12:47:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172734 states. [2022-07-13 12:47:34,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172734 to 162220. [2022-07-13 12:47:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162220 states, 162219 states have (on average 1.0384233659435702) internal successors, (168452), 162219 states have internal predecessors, (168452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162220 states to 162220 states and 168452 transitions. [2022-07-13 12:47:35,211 INFO L78 Accepts]: Start accepts. Automaton has 162220 states and 168452 transitions. Word has length 746 [2022-07-13 12:47:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:47:35,212 INFO L495 AbstractCegarLoop]: Abstraction has 162220 states and 168452 transitions. [2022-07-13 12:47:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 12:47:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 162220 states and 168452 transitions. [2022-07-13 12:47:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1448 [2022-07-13 12:47:35,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:47:35,321 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:47:35,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 12:47:35,321 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:47:35,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:47:35,322 INFO L85 PathProgramCache]: Analyzing trace with hash 901557467, now seen corresponding path program 1 times [2022-07-13 12:47:35,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:47:35,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578389245] [2022-07-13 12:47:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:47:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:47:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:47:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1745 backedges. 1698 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-13 12:47:36,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:47:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578389245] [2022-07-13 12:47:36,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578389245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:47:36,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:47:36,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 12:47:36,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049003105] [2022-07-13 12:47:36,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:47:36,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 12:47:36,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:47:36,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 12:47:36,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:47:36,090 INFO L87 Difference]: Start difference. First operand 162220 states and 168452 transitions. Second operand has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)